package com.luyi.sensor.websocket.controller;

import cn.hutool.json.JSONArray;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.luyi.sensor.dao.sensorRecord.SensorRecordMapperImpl;
import com.luyi.sensor.entity.SensorRecord;
import com.luyi.sensor.util.ApplicationContextRegister;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 *  websocket服务
 */
@ServerEndpoint(value = "/chat/{username}") //当前用户
@Component
public class WebSocketServer {

//    @Autowired
//    SensorRecordMapperImpl sensorRecordMapperImpl = new SensorRecordMapperImpl();

//    @Autowired
//    public void setActionLogMapper(ActionLogMapper actionLogMapper) {
//        WebSocket.actionLogMapper = actionLogMapper;
//    }
    /**
     * 用来解决webSocket中无法注入mapper
     */
//    private static ApplicationContext applicationContext;
//
//    public static void setApplicationContext(ApplicationContext context) {
//        applicationContext = context;
//    }

    private static final Logger log = LoggerFactory.getLogger(WebSocketServer.class);

    /**
     * 记录当前在线连接数
     */
    public static final Map<String, Session> sessionMap = new ConcurrentHashMap<>();

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("username") String username) {
        //将用户加入到在线人群列表中
        sessionMap.put(username, session);
        log.info("有新用户加入，username={}, 当前在线人数为：{}", username, sessionMap.size());
        JSONObject result = new JSONObject();
        JSONArray array = new JSONArray();
        result.set("users", array);
        for (Object key : sessionMap.keySet()) {
            JSONObject jsonObject = new JSONObject();
            jsonObject.set("username", key);
            // {"username", "zhang", "username": "admin"}
            array.add(jsonObject);
        }
//        {"users": [{"username": "zhang"},{ "username": "admin"}]}
        sendAllMessage(JSONUtil.toJsonStr(result));  // 后台发送消息给所有的客户端
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose(Session session, @PathParam("username") String username) {
        sessionMap.remove(username);
        log.info("有一连接关闭，移除username={}的用户session, 当前在线人数为：{}", username, sessionMap.size());
    }

    /**
     * 后台收到客户端发送过来的消息
     * onMessage 是一个消息的中转站
     * 接受 浏览器端 socket.send 发送过来的 json数据
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session, @PathParam("username") String username) throws JsonProcessingException { //username从链接中取，非传值
        log.info("服务端收到用户username={}的消息:{}", username, message);

        //注入mapper层
//        SensorRecordMapperImpl sensorRecordMapperImpl = applicationContext.getBean(SensorRecordMapperImpl.class);
        SensorRecordMapperImpl sensorRecordMapperImpl = ApplicationContextRegister.getApplicationContext().getBean(SensorRecordMapperImpl.class);

        JSONObject obj = JSONUtil.parseObj(message);

        String toUsername = obj.getStr("to"); // to表示发送给哪个用户，比如 admin
//        obj.get("");
        String text = obj.getStr("text"); // 发送的消息文本  hello
//        SensorRecord sensorRecord = (SensorRecord) obj.get("text"); // 发送的消息文本  hello

        // {"to": "admin", "text": "聊天文本"}

        ObjectMapper objectMapper = new ObjectMapper();
        //允许忽略JSON中的未知字段
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);
        SensorRecord sensorRecord = objectMapper.readValue(text, SensorRecord.class);

        System.out.println(sensorRecord.getSensor_value());
        System.out.println(sensorRecord.getCreate_time());

        System.out.println("==============================");
        sensorRecordMapperImpl.insertRecord(sensorRecord);//TODO： 插入值

        Session toSession = sessionMap.get(toUsername); // 根据 to用户名来获取 session，再通过session发送消息文本
        if (toSession != null) {
            // 服务器端 再把消息组装一下，组装后的消息包含发送人和发送的文本内容
            // {"from": "zhang", "text": "hello"}
            JSONObject jsonObject = new JSONObject();
            jsonObject.set("from", username);  // from 是 zhang
            jsonObject.set("text", text);  // text 同上面的text



            this.sendMessage(jsonObject.toString(), toSession);
            log.info("发送给用户username={}，消息：{}", toUsername, jsonObject.toString());
        } else {
            log.info("发送失败，未找到用户username={}的session", toUsername);
        }
    }

    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 服务端发送消息给客户端
     */
    private void sendMessage(String message, Session toSession) {
        try {
            log.info("服务端给客户端[{}]发送消息{}", toSession.getId(), message);
            toSession.getBasicRemote().sendText(message);
        } catch (Exception e) {
            log.error("服务端发送消息给客户端失败", e);
        }
    }

    /**
     * 服务端发送消息给所有客户端
     */
    private void sendAllMessage(String message) {
        try {
            for (Session session : sessionMap.values()) {
                log.info("服务端给客户端[{}]发送消息{}", session.getId(), message);
                session.getBasicRemote().sendText(message);
            }
        } catch (Exception e) {
            log.error("服务端发送消息给客户端失败", e);
        }
    }
}
